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  1. The subdivision of Asclepiadaceae
    By: El-Gazzar, A - Hamza, M K
    Type: Article
    In: Phytologia.
    Volume: 45
    Date: 1980
    Page Range: 1--16
    Publication info: Bronx Park, New York,H.A. Gleason and H.N. Moldenke,
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